forked from luck/tmp_suning_uos_patched
ext4: move the jbd2 wrapper functions out of super.c
Move the jbd2 wrapper functions which start and stop handles out of super.c, where they don't really logically belong, and into ext4_jbd2.c. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
parent
343d9c283c
commit
722887ddc8
@ -2149,6 +2149,8 @@ extern void *ext4_kvzalloc(size_t size, gfp_t flags);
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extern void ext4_kvfree(void *ptr);
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extern int ext4_alloc_flex_bg_array(struct super_block *sb,
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ext4_group_t ngroup);
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extern const char *ext4_decode_error(struct super_block *sb, int errno,
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char nbuf[16]);
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extern __printf(4, 5)
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void __ext4_error(struct super_block *, const char *, unsigned int,
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const char *, ...);
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@ -6,6 +6,107 @@
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#include <trace/events/ext4.h>
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/* Just increment the non-pointer handle value */
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static handle_t *ext4_get_nojournal(void)
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{
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handle_t *handle = current->journal_info;
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unsigned long ref_cnt = (unsigned long)handle;
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BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
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ref_cnt++;
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handle = (handle_t *)ref_cnt;
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current->journal_info = handle;
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return handle;
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}
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/* Decrement the non-pointer handle value */
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static void ext4_put_nojournal(handle_t *handle)
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{
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unsigned long ref_cnt = (unsigned long)handle;
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BUG_ON(ref_cnt == 0);
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ref_cnt--;
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handle = (handle_t *)ref_cnt;
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current->journal_info = handle;
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}
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/*
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* Wrappers for jbd2_journal_start/end.
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*/
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handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
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{
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journal_t *journal;
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trace_ext4_journal_start(sb, nblocks, _RET_IP_);
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if (sb->s_flags & MS_RDONLY)
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return ERR_PTR(-EROFS);
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WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);
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journal = EXT4_SB(sb)->s_journal;
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if (!journal)
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return ext4_get_nojournal();
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/*
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* Special case here: if the journal has aborted behind our
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* backs (eg. EIO in the commit thread), then we still need to
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* take the FS itself readonly cleanly.
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*/
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if (is_journal_aborted(journal)) {
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ext4_abort(sb, "Detected aborted journal");
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return ERR_PTR(-EROFS);
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}
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return jbd2_journal_start(journal, nblocks);
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}
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int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
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{
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struct super_block *sb;
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int err;
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int rc;
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if (!ext4_handle_valid(handle)) {
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ext4_put_nojournal(handle);
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return 0;
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}
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sb = handle->h_transaction->t_journal->j_private;
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err = handle->h_err;
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rc = jbd2_journal_stop(handle);
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if (!err)
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err = rc;
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if (err)
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__ext4_std_error(sb, where, line, err);
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return err;
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}
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void ext4_journal_abort_handle(const char *caller, unsigned int line,
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const char *err_fn, struct buffer_head *bh,
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handle_t *handle, int err)
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{
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char nbuf[16];
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const char *errstr = ext4_decode_error(NULL, err, nbuf);
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BUG_ON(!ext4_handle_valid(handle));
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if (bh)
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BUFFER_TRACE(bh, "abort");
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if (!handle->h_err)
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handle->h_err = err;
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if (is_handle_aborted(handle))
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return;
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printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n",
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caller, line, errstr, err_fn);
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jbd2_journal_abort_handle(handle);
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}
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int __ext4_journal_get_write_access(const char *where, unsigned int line,
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handle_t *handle, struct buffer_head *bh)
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{
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107
fs/ext4/super.c
107
fs/ext4/super.c
@ -69,8 +69,6 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
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static void ext4_clear_journal_err(struct super_block *sb,
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struct ext4_super_block *es);
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static int ext4_sync_fs(struct super_block *sb, int wait);
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static const char *ext4_decode_error(struct super_block *sb, int errno,
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char nbuf[16]);
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static int ext4_remount(struct super_block *sb, int *flags, char *data);
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static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
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static int ext4_unfreeze(struct super_block *sb);
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@ -296,107 +294,6 @@ void ext4_itable_unused_set(struct super_block *sb,
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}
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/* Just increment the non-pointer handle value */
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static handle_t *ext4_get_nojournal(void)
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{
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handle_t *handle = current->journal_info;
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unsigned long ref_cnt = (unsigned long)handle;
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BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
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ref_cnt++;
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handle = (handle_t *)ref_cnt;
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current->journal_info = handle;
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return handle;
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}
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/* Decrement the non-pointer handle value */
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static void ext4_put_nojournal(handle_t *handle)
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{
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unsigned long ref_cnt = (unsigned long)handle;
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BUG_ON(ref_cnt == 0);
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ref_cnt--;
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handle = (handle_t *)ref_cnt;
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current->journal_info = handle;
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}
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/*
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* Wrappers for jbd2_journal_start/end.
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*/
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handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
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{
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journal_t *journal;
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trace_ext4_journal_start(sb, nblocks, _RET_IP_);
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if (sb->s_flags & MS_RDONLY)
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return ERR_PTR(-EROFS);
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WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);
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journal = EXT4_SB(sb)->s_journal;
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if (!journal)
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return ext4_get_nojournal();
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/*
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* Special case here: if the journal has aborted behind our
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* backs (eg. EIO in the commit thread), then we still need to
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* take the FS itself readonly cleanly.
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*/
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if (is_journal_aborted(journal)) {
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ext4_abort(sb, "Detected aborted journal");
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return ERR_PTR(-EROFS);
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}
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return jbd2_journal_start(journal, nblocks);
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}
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int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
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{
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struct super_block *sb;
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int err;
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int rc;
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if (!ext4_handle_valid(handle)) {
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ext4_put_nojournal(handle);
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return 0;
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}
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sb = handle->h_transaction->t_journal->j_private;
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err = handle->h_err;
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rc = jbd2_journal_stop(handle);
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if (!err)
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err = rc;
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if (err)
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__ext4_std_error(sb, where, line, err);
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return err;
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}
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void ext4_journal_abort_handle(const char *caller, unsigned int line,
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const char *err_fn, struct buffer_head *bh,
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handle_t *handle, int err)
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{
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char nbuf[16];
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const char *errstr = ext4_decode_error(NULL, err, nbuf);
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BUG_ON(!ext4_handle_valid(handle));
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if (bh)
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BUFFER_TRACE(bh, "abort");
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if (!handle->h_err)
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handle->h_err = err;
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if (is_handle_aborted(handle))
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return;
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printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n",
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caller, line, errstr, err_fn);
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jbd2_journal_abort_handle(handle);
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}
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static void __save_error_info(struct super_block *sb, const char *func,
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unsigned int line)
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{
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@ -582,8 +479,8 @@ void ext4_error_file(struct file *file, const char *function,
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ext4_handle_error(inode->i_sb);
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}
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static const char *ext4_decode_error(struct super_block *sb, int errno,
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char nbuf[16])
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const char *ext4_decode_error(struct super_block *sb, int errno,
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char nbuf[16])
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{
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char *errstr = NULL;
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